A collection of puzzles statements, with references, on a variety of topics: operations research, such as crossing the bridge; logic, including liars and truth tellers, mastermind, and age problems; lateral thinking, also known as "situation puzzles"; probability, with a generalization and approximation of the birthday problem; counting; arithmetic and analysis; floor and ceiling; whole number; mechanical; packing, covering and dissecting; geometry, featuring several "bamboozlement" puzzles; topology, including Sam Lloyd's "magic holetite pencil," which gave rise to the expression "to buttonhole someone"; information, including weighting problems; combinatorics; and algebra.